Side frame and bolster for a railway truck and method for manufacturing same

Abstract

A method for manufacturing cores utilized in conjunction with a mold for casting a side frame of a railway car truck includes forming separate drag and cope portions of at least one pedestal core. The drag and cope portions of the pedestal core define an interior region of a pedestal of the side frame. The drag and cope portions are attached form a pedestal core for insertion into a mold.

1 . A method for manufacturing cores utilized in conjunction with a mold for casting a side frame of a railway car truck, where the side frame includes forward and rearward pedestal jaws for mounting a wheel assembly from a wheel set, and wherein each pedestal portion extends from a respective end of the side frame to a bolster opening of the side frame, the method comprising:
 forming, in a first core box, a first core that defines a drag side of an interior region of at least one pedestal of the side frame, wherein the interior region extends from an end of the side frame to a side frame column that defines the bolster opening;   forming, in a second core box, a second unified core that defines a cope side of an interior region of the at least one pedestal of the side frame, wherein the interior region extends from an end of the side frame to a side frame column that defines the bolster opening;   attaching the first core to the second core together to thereby form a pedestal core assembly for insertion into the mold.   
     
     
         2 . The method according to  claim 1 , wherein the pedestal core defines an opening between an inboard vertical jaw and an outboard vertical jaw of the pedestal. 
     
     
         3 . (canceled) 
     
     
         4 . The method according to  claim 1 , wherein the pedestal core defines core prints at the end of the pedestal, diagonal tension member, and at the column windows. 
     
     
         5 . The method according to  claim 1 , wherein the drag and cope portions are attached via an adhesive. 
     
     
         6 . A core assembly utilized in conjunction with a mold for casting a side frame of a railway car truck, where the side frame includes forward and rearward pedestal jaws for mounting a wheel assembly from a wheel set, and wherein each pedestal portion extends from a respective end of the side frame to a bolster opening of the side frame, the core assembly comprising:
 a drag portion, formed in a first core box, that defines a drag side of an interior region of at least one pedestal of the side frame, wherein the interior region extends from an end of the side frame to a side frame column that defines the bolster opening; and   a cope portion, formed in a second core box, that defines a cope side of an interior region of the at least one pedestal of the side frame, wherein the interior region extends from an end of the side frame to a side frame column that defines the bolster opening.   
     
     
         7 . The core according to  claim 6 , wherein the drag and cope portions define at least one opening between an inboard vertical jaw and an outboard vertical jaw of the pedestal. 
     
     
         8 . (canceled) 
     
     
         9 . The core according to  claim 6 , wherein the drag and cope portions define core prints at the end of the pedestal, diagonal tension member, and at the column windows. 
     
     
         10 . The core according to  claim 6 , wherein the drag and cope portions are attached via an adhesive. 
     
     
         11 . A core assembly for use in manufacturing a bolster of a railway car truck, the core assembly comprising:
 a main body core that defines substantially an entire interior region of the bolster that extends from a center of the bolster towards inward gibs positioned at outboard end sections of the bolster, and that defines a first part of an interior end section of the bolster that extends from the inward gibs towards respective ends of the bolster; and   end cores that define a second part of an interior region of the end section of the bolster.   
     
     
         12 . The core assembly according to  claim 11 , wherein the main body core comprises a first portion that extends from the center of the bolster towards a first inward gib position at a first outboard end, and a second portion that extends from the center of the bolster towards a second inward gib positioned at a second outboard end. 
     
     
         13 . The core assembly according to  claim 15 , wherein the end cores are attached to respective ends of the main body core via an adhesive. 
     
     
         14 . The core assembly according to  claim 11 , wherein the main body core defines a first core print that defines a brake window opening of the bolster, a second core print that defines a lightener opening of the bolster, and a third core print that defines an end opening of the bolster, wherein the first and the second core prints are substantially centered with a parting line that separates cope and drag portions of the bolster, and wherein the third core print supports outboard ends of the main body core within a mold. 
     
     
         15 . A method for manufacturing cores utilized in conjunction with a mold for casting a side frame of a railway car truck, where the side frame includes forward and rearward pedestal jaws for mounting a wheel assembly from a wheel set, and wherein each pedestal portion extends from a respective end of the side frame to a bolster opening of the side frame, the method comprising:
 forming a bolster opening core that defines a first portion of a feed path positioned adjacent to a second portion of the feed path that is defined in a drag portion of a mold, wherein a molten material flows through the feed path when the side frame is cast.